Heat-treated 12.9 Grade High Strength Bolts for Mill Liners

Material Grade: 40Cr;

Quality Level: 12.9  Grade

Sizes: M24, M27,M30,M36,M42,M45;

Bolt-head Shape: oval head, square head,ellipse head;

Special Features:

1. The high strength bolts have been widely used in large ball mills up to dia.12-meter mills.

2. The high strength screws can be reliably used in small,middle and large cement mills,coal mils and mine mills.

3. The high strength bolts have been properly heat-treated to achieve better mechanical properties.

4. The standard bolt units include one rubber ring,concave washer,spring washer and nut.